Perforating machine



April 13 1926.

P. R. GLASS PERFORATING MACHINE Filed July 26, 1922 5 Sheets-Sheet 5 April is 1926.

P. R. GLASS 1 PERFORATING MACHINE Filed July 26, 1922 5 Sheets-Sheet 4 April 13,1926. 1,580,132

P- R. GLASS PERFORATING cams Filed July 26, 1 22 5 s eets-sheet 5 Patented Apr. 13,

UNITED STATES IEBLEY It. GL-ASS,

MACHINERY con JERSEY.

PATENT oFFicE.

or. WAYLAND, massacnusn'r'rs, assiqnon 'ro imirnn anon rom'rro v,

F PATERSON, NEW JERSEY, A CORPORATION OF NEW rnnroaarme' MACHINE.

Application filed July 26, 1932. Serial No. 577,704.

To all whom it may concern:

Be it known that I, p

United .States,

citizen of the PERLEY R. Gnass, a residing at of M/iddlesex and have invented cernection with the accompanying drawings, is

a specification, like re the drawings indicati V several figures.

. machines of the type ference characters on ng like parts in the This invention relates to punching inachines and is herein illustrated as embodied in a machine for perforating parts of shoes for.ornamentalpurposes.

It is common practice. at the present time to perforate stock by punch plate and a strip of paper being plate under the stock for the punch and insure tions without damage machines feed the paper at every stroke of under the punch. usually feeding it between a reciprocating. punch, a

fed over the punch to act as a backing clean cut perforato .the punch. Such control of the punch, and are uneconomical of paper which is an expensive item. lication Ser. No. 329,

In my co-pending ap- 997, upon which, Patout No. 1.448310 was granted March 13,

1923, there is disclosed od which economizes backing by punching same area. while the paper and a machine'and methinthe use of paper several times in the punch plate are gradually lifted toward the punch to bring about a deeper penetration of the punch at each stroke entire thickness of the Objects of this greater economies invention are perforating machine which will allow [still ,1

in the use of backing mathcreby utilizing the paper. I I

to prov de a terial and to simplifyand otherwise improve disclosed in said application without sacrificing any of the advan tages of such machines as heretofore constructed.

of times against the backing strip, which is To these ends, in the illustrated machine, the punchis reciprocated a number same portion of the clamped and retained at the same level during punching, and the strip is then fed forward under the control of" the punch. Such a constant level is possi repeated punching in a single position with'thc strip held at a ble without reducing punchings j Preferably and otherwise improving three dimensions-of the strip are utilized.v

plate sup- As the quality of backing material is not uniform, the illustrated machine also provides for predeterminately varying the number of reciprocations of the punch which take place against a given portion of the strip, thus allowing a larger number of in a single position when the character of the strip permits. In the embodiment of the invention selected for illustration, the backing strip is plate and kept under constant tension by a feed roller, there being a clamping mem r controlled by the machine for intermittently releasing the backing strip for feeding after the predetermined number of punchings.

organized that the punch-controls'both the feed of the work and the feed of the backing strip. As shown herein in my improved machine, the work feeding stroke is intermittently, after a variably" predetermined interval, rendered efiective to feed the paper also'by mechanism which raises the backin strip so that the punch remains embedded therein during the work feeding stroke.

Other features of the invention relate to improved mechanism for actuating' the unch, controlling and guiding the work,

' the action of perforating machines generally.

Referring to the drawings Fig. 1 is a side elevation of the machine with some parts removed and some in section; j

Fig. 2 is a front elevation partly in section with the cover plate removed.

Fig. 3 is a perspective view of aportion of the front of the machine.

Fig. 4 is a vertical section of the punch the punching mechanism is so' led over a punch to normal position at the beginning of each feed movement.

Fig. (i is a perspective view of a portion of the front of the machine looking from the right and rear;

Fig. 7 is a perspective view of a work gage with a slightly modified positioning means;

Figs. 8 and 9 are detail views of a portion of the gage;

Fig. 10 is a perspective view of a portion of the front of the machine as seen from the left and front;

Fig. 11 is an exploded view of the punch plate and associated parts;

Fig. 12 is a vertical section through the feed roll and its driving means;

Fig.13 is a vertical section of the punch and punch plate;

Fig. let is a perspective view, looking from the rear, of the variable speed driving mechanism, clutch and stop mechanism:

Fig. 15 is a vertical section of the same;

Fig. 16 is an exploded view. partly in section, of the clutch and stop mechanism; and

Fig. 17 is a perspective view of a detail.

The illustrated machine is of the type which employs a four-motion feed punch, there being in addition a slight relief movementv of the punch preparatory to feeding the material. The machine comprises a frame 16 having a hollow arm 18 overhanging a circular work table 20. the work being fed rearwardly over the table away from the operator and in alinement with said overhanging arm. A vertical feed sleeve 22 is mounted for front to rear reciprocation in the overhanging arm and carries slidably the punch carrying sleeve 21, the latter hav ing at its upper end a guide channel 26 formed by an upper flange 28 and a wear plate or shim 30. The punch carrying sleeve 24 is reciprocated vertically b v mechanism comprising a block 32 slidable within the guide channel 26 and pivoted to the lower end of an arm on a lever 3t rockably hung on a pivot pin 36 of the frame. Between the upperend of the lever and an car 40 (Figs. 2 and 3) on a loose hub on the pivot pin 36 is pivoted the front end of an actuating link 4-2, the rear end being pivoted to the upper end of a cam lever 41 which swings on a shaft 46 extending across the frame. The lower end of the cam lever is forked to embrace a three-way cam 48 on the main cam shaft: 50. The cam 48 is formed in a manner to cause a punching movement followed by a dwell, a feed movement of the punch being effected by other mechanism during the dwell. The lower arm of the lever 31 which is hung at 36 is swung by the above described mechanism, from the position shown in Fig. 1 in which the punch is raised, to a position just beyond dead center, this arrangement causing a slight rise or relief movement of the punch which 'will be hereinafter referred to.

The feed sleeve 22 has at one side a pair of horizontal sleeves 60 and (32 (Fig. l)- which are secured rigidly to upper and lower hollow guide rods (51 and ($6 the ends of which slide in bearings 68 and 70 on the frame and in bearings 72 and 71 (Fig. 1o) formed on a removable cover plate or cap piece 76 which closes the front of the hollow overhanging arm. At the rear of the feed sleeve 22 are two projecting cars 78 (the nearer of which may be seen in Fig. 10) between which is pivoted a link 80 extending rearwardly within the hollow arm (Fig. l) and pivotally joined at its rear end to a block 84 slidably mounted in a channel formed on the far side of a rock arm St; fixed to the rock shaft 88. A second arm fixed to the rock shaft 88 is connected by means of a link 92 to the arm 91 of a lever pivoted at 96 to the frame and having between its ends a forked portion embracing a three-way aim 98 on the cam shaft 50. The cam 98 is so formed that it actuates the feed sleeve 22 when the punch is stationary and causes the feed sleeve to dwell when the punch is being reciprocated. The work feeding stroke of the punch may be varied by sliding the block 84 in the chan nel of the rock arm 86, the channel being curved about the front end of the link So as a center so that adjustment of the feed does not affect the initial position of the punch. As shown, the block is pivotally connected by a link 100 to an arm 102 fixed to a rock shaft 104 which is actuated by r. handle 106 (Fig. 3). Another arm 10% p1'o jecting from the rock shaft has at the end a segmental surface 110 provided with gage marks for co-operation with an index bar 112 fixed to the frame. The arm 1 8 is slotted as indicated at ll-l for the reception of a clamp screw 116 which holds it in ad justed position.

The punch may comprise a single punch 120 (l igs. 5 and 123) or a plurality of punches arranged in any desired pattern in a. collet 122 which is detachably fixed by a clamp screw 121 in a head 12(3 carrying the swivel ling punch spindle 12S. \Vhatever the arrangement of the punches. the master punch indicated at 120 should be in alincment with the punch spindle. the remaining punches and thecollet 122 being eccentric-ally disposed so that the work can be fed ina proper man ner around curves as is well understood in the art. The head 126 is held. from abnormal Swivelling movement by a pin 129 project ing upwardly into a. slot in the lower end of the punch carrying sleeve 2- The punch spindle is held within the sleeve by a nut 130 (Fig. 1) at the upper end. If, when operating on curved work, the punch is ro- Til ' piece to.

I in vertical tated from normalposition. it is restored to its original position at the beginning of each subsequent feed movement; by means of a V-shaped notch. 132 (Fig. 51 in the spindle which contacts with a cam or wedge shaped surface on a plunger lit-l slid-ably mounted in a square opening 136 in the cap The plunger is pressed rearwardlv by a spring 1.40 surrounding the hank 13 of'the plunger and movement under control of the spring. is limited b v a nut on the outer end of the shank. In order for the plunger 131 to have access to the punch spindle, this plunger passes through an and through in the feeding sleeve as inopening a slot in the punch carrying sleeve "3-idicated in Fig.3.

For holding the work support 'while the punch is being retracted from the material. the following hold-down mechanism (best shown in Figs. 1 and 10) is employed: A presser foot bar 144 slid-able bearings of the frame carries at its lower end a split sleeve 146 having a horizontal rib on which slides horizontally against the work the channel block 1-18, a clamp screw 150 holding this member in adjusted position. A hold-down 152 formed integrally with the block 1118 lies against the work opposite the punch when the latter is at the beginning of its feed stroke and isadjusted toward and from the line of feed of the punch by loosening the clamp screw 150 and adjusting the block 148. A second holddown 15-11, which extends around just to the rear of the punch when the latter is at its rearward limit of feeding movement, has a horizontal (27itension at the upper end which is slidablv mounted in the block 148 and held in adjusted position by the set screw 155. 'lhi s second hold-down member 154. therefore. can be adjusted with the ti st hold-down 15') toward and from the line of feed of the punch and it also has an independent ad justment in the direction of the-linc of feed so that, when thefeed stroke of the punch is changed. the position-of the hold-down 151 can be changed to correspond. The presser foot bar 144 is prevented from turning by a slide block 15(1 fixed to the upper end of the bar and slidahle in a groove of the overhanging arm. The bar 14-4 is actuated intermittentlv, in alternation with the reciprocation of the punch. by a'roller 15S riding on a cam surface 160 at the upper end of the lever 34. A coiled spring surrounding the. barM-l'keeps the hold-downs yieldinglv against the work. To allow the operator to lift the presser foot bar when desired, there projects from the bar a lift pin 162 engaged by an arm 164 of a lever pivoted at. 166 on the frame and n'ianipulated bv. a rod 168 connected to a foot treadle (not shownl.

A stop pin 170 on the frame limits the moveposition which can be lined by ment' of the arnrlGl when the treadle is of the gage block towards and from the line.

o 1' feed of the punch, a hand screw 186 having a collar 18% interposed hetweenlugs 190 on thebracket 180-is threaded into the gage block. The gage block has an inclined hearing for the reception of a gage stem or spindle 19-2. the block being split as indicated at 190' to form in conjunction with the clamp screw 1971'. a clamping sleeve. \Vhen the clamping screw is loosened,'the gage spindle ma be turned to move the work engaging members to an out of the way position. B reason of the inclination of the stem. the attached work engaging members will be raised from the work support as the spindle is turned. The gage spindle 192 has a groove 1%" at the lower end receiving the edge of a collar 200 on a hand screw 202 by which the spindle may be raised and lowered. At the lower end of the spindle is a rigid gage arm 20-1 the nd nearest the punch being of cylindrical formation (Figs. 8 and 9) and overlying the work support to act as a guide for a slidable cvlindrical casing oredge gage 306 for the work \V. held down yieldinglyagainst the work support by a spring 20? fixed to the gage arm and entering a slot in the casing. The edge gage can therefore vield upwardly when the punch plate is raised as hereinafter de scribed; Swiveling movement of the gage arm in the line of feed is limited by means of a stop screw .208 which passes through :1 lug on the gage block 182 and'abuts against the arm. A presser foot 210 (Fig. 2) in the form of a leaf spring is attachcd to the gage arm andis arranged to be adjusted toward and from the work support bv the adjusting screw 212. It is ap 'nirent that bv loosening the clamp screw 19% the edge gage may be turned in the line of feed to any desired means of the stop screw E208.

Tn Fig. 7 is illustrated a modified constructioirby which a tine adjustinent of the work agaging members can be quickly sceured. l'le't'crence numerals derived bv addin t 300 to those previouslv used designate parts analogous to those of Fig. i. Project'- ing from the overhanging arm is a guide rod 190 having a U-shaped groove li l. Slidable, on the rod is a small sleeve or adjustable men'lber -181- whlch can be clamped in any Projecting from the desired position by a clamp screw. A gage block 482 is likewise adjustable 0n the rod in a similar manner and is connected to the sleeve by a horizontal adjusting screw 486 of fine pitch. By loosening the clamp screws that hold the sleeve and the block to the guide rod, the block and sleeve may be quickly moved to approximatelv the position desired. By then clamping the sleeve 48& in position, the block 482 may be aimed to the exact position desired by means of the screw 486 of fine pitch, above mentioned. Keys 491 in the groove 48L serve as abutments for the clamp screws and prevent the sleeve and block from turning. The gage stem 492 is swivelled in the block 4-82 at an inclinatim'i and is adjustable vertically by nuts at the upper end. Swivelling is limited by astop screw 508 and the angular position is fixed by a clamp screw till. This mechanism is of particular value when the character of work changes from that kind in which the perforations are close to the edge to a different kind of work in which the perforations are widely spaced from the edge.

To avoid injury to the punches and to insure clean cut perforations, a backing surface such as a strip, preferably of paper, is provided and this strip is intermittently fed over the punch block between the latter and the punch. A supply reel 218 (Figs. 1, 10 and 12) has a trunnion 220 mounted in a bracket 22st and held against too free rota-- tion by a spring-pressed plug 222. The backing strip extends over the punch block to a take-up reel 226 which maintains the strip under tension. The reel has a detachable flange (Fig. 12) whichis held against the hub by a threaded sleeve 228 having a knurled head. The hub is splined to a shaft 232 journaled in the frame and loosely carrying a worm wheel 234 driven by a worm 236 on a worm shaft 238 driven in any suitable manner from the main cam shaft. Leather, friction washers 239 are interposed between the worm and a pair of collars 240 and 242, the former being secured to the shaft by .a set screw and the latter being splined thereon by a pin key. The leather, friction washers are held against the worm wheel with the desired pressure by a coil spring interposed between the collar 242 and nuts 246 on the end of the shaft. There is thus a constant tendency to turn the reel to feed'the paper, but normally the paper is prevented from moving by a. clamp device which will be hereinafter referred to. The supply reel and take-up reel are interchangeable.

As above stated, the punch has a fourmotion feed and an additional movement of relief, that is. after the punch perforates the stock and penetrates the backing strip, it is withdrawn from the backing strip preparatory to feeding the work. Hitherto punch feeding mechanisms employing a backing strip have fed the backing strip at every stroke of the punch. By this invention the relief movement of the punch is neutralized intermittently, so that it remains imbedded in the strip to feed the latter at intervals, the frequency depending on the nature of the strip material. For instance, with a comparatively soft paper, four punchings might be carried out against the same portion of the backing strip before the punch comes into undue proximity to the punch plate, whereas on harder paper it might be practical to punch eight or sixteen times against the same portion of the strip. Mechanism is provided, therefore, by which the relief movement of the punch can be neutralized as frequently as desired and thus economize on paper to the fullest extent. Briefly, this movement is neutralized by periodically raising the punch block and the backing strip so that the punch remains embedded in the backing strip during the punch feeding movement, thus causing the strip to. be fed under control of the punch.

An anvil 250 (Figs 4 and 11) arranged under the punch has at each side a guideway in which is slidably mounted a cheek plate 254 projecting downwardly from a horizontal guide plate 256 having an oblong opening 258 surrounding the upper edge of the anvil. Guide flanges 260 on the guide plate project upwardly to guide the edges of the paper. Around the opening 258 in the guide plate there is formed a ledge 262 arranged to fit loosely the oblong punch plate 264- which may be of steel. A holding member or clamp plate 266 which is slotted and overlies the sides of the punch plate has vertical side flanges 268 secured by screws 270 to the cheek plates 254. The anvil has a slot 274 slightly elongated vertically to allow for relative movement of a pivot pin 272 passing through the cheek plates 254 and an arm 276 which is rigidly secured to a hub 278 loose on the rock shaft 280. The rock shaft 280 is journaled in a. bearing. sleeve 282 (Fig. 6) formed as a part of the anvil 250 and at one end the rock shaft has a depending arm 284 interposed between a. stop screw 288 fixed in a lug 286 depending from the sleeve 278 and a spring'pressed stud 292 (Fig. 3) formed in a second lug 290 depending from the sleeve 278. This mechanism forms an impositive connection between the rock shaft 280 and the sleeve 278 so that the punch plate can be yieldingly raised. At the other end of the rock shaft is fixed a. depending arm 294 (Fig. 10) which is forked at its lower end to receive a guide pin 296 on which slides a cam roller 298 for cooperation with any one of three cams 300, 302, 304. A spring-pressed stud 305 presses against the arm 2% to maintain the roller against its cam. These cams are formed with different arm 294 to raise the guide? plate 256 numbers of projections which, vary directly with the frequency of the feeding movements of the back ng strip. The cam roller 298 can be shifted opposite any one of these,

cams by a fork 2106 on theendof a shifting .rod 308 slitlably mounted in the frame and naled in the base of the machine, a. worm wheel 316 fixed to theshaft being driven by anintermittent worm 318 on the shaft. 238.

'It' should be noted (Figs. 4 and 13.)that the punch plate 264 normally rests 'onthe anvil 250 and that the ledge 262 of the guide plate is normally below thelower surface of the punclr plate. Consequently. when. the projections on the selected'can'r oscillate the and the clamp plate 266', the backing strip is first releasedfor feeding movement and the subsequent contact of the ledge 262 with the punch plate 264 raises the: latter and the tracking strip and keeps the punchembedded in the strip during the relief and feeding n'iovements of the punch. thereby neutralizing the relief movement and causing .the punch to control the feed of the paper. The paper is not necessarily fed the full distance of the punch stroke, however, sincethe cams may be designed to keep the punch plate and hacking stripraised only ."forfa portion of the punch stroke, thus lowering the paper from the punch before the latter reaches the end of its stroke.

As indicated in Fig. 4. the anvil is movable vertically to aslight extent in a vertical. recess inthe cast-ing 324. A slot 320 in the anvil'receives a wedge 322 having at the end a fork which isrecei'ved in a groove 326 of a hand screw threaded in the casing 324. This is merely a preliminary adjustment to set the anvil and. punch plate at the proper height to co-operatewith the punch. 6 parts, including the punch plate and the work table. are mounted for horizontal ad'- justmcnt on a shelf-330 (Fig. 3) on the frame. there being a groove 332 in. the frame engaged by a collar 334 on an adjusting screw 336 threaded in a lug 338 of the castbolts- 340 ing 324. Clamping passing through horizontally extending slotsin the casting serve to'hold the casting 'sand associated parts in the desired position. this adjustment moving the backing strip widthwise'so that any portion of its width may be fed to'thc punch. liy this'invention. thcree fore. a backing strip is utilized in all three dimensions. It is fed under the punch in the direction of its length. it can be adjusted widthwise so that the entire width is used,

outwardly by a path of the clntchpins 366. The slidable The casting 324 and associated,

and by punching several times .in' the same area of the backing strip the thickness also is used. Formed as a part of the casting 324' are the substantially triangular ledges 342 to which'the work table 20 is secured (Fig. 10) by screws. H 1

Inasmuch as perforating machines often run at high speed and are frequently started and stopped, it is desirable to bringjthem to a stop as quickly aspossible without shock,

As the character of workvaries, .it is also. desirable to-be able to var yjthe speed, as.

when operating on curved portions of a piece of work. This is accomplished byfthe mech: anism shown in Figs, 14 to'17 in which 352 is a; belt-driven pulley loosely I mounted .on thehub,354 of-the friction pulley 356; .The friction pulley is provided -.on oneside face 1 with a pair of spherical friction surfaces'358 for engagement with frictionrolls 360 which,

on the;opposite sides of theirperipheries,

bear against spherical friction surfaces. 362 on a wheel or clutch-.member-. 364. Two

clutch pins 366, projectingvfrom the hub of the wheel 364, are housed within the cylindrical flange 367 which encloses a sleeve 370 carrying a clutch pin 368'normally pressed coil spring 372 to liein the clutch pin 368 is rigidly connected. to a member 374 surrounding the sleeve .370 and having a cam surface 376 for co-operation with a treadle rod 378 the upper end of which acts as astop pin engaging a shoulder on the member 374. lVhen the treadle rod is I depressed, the member 374 is free to move endwise, the spring 372 carrying the pin 368 into the path of the pins 366 thereby transmitting power to the. sleeve 370 which is keyed to the camshaft 50. 'The friction rolls 360 rotate on vertical pivot pins 379 carried in brackets 380 which are connected to rock shafts 381 and 382, these shafts being interconnected for. simultaneous movement by means of arms-384 having. interengaginggear sectors." An arm 386 on the rock'shaft 381' is held towards-one limit of its movement by a comparatively strong coil spring 388 attached to the-frame, this spring always tending to hold the frictionrolls in the low speed position as shown in Fig. 15. Another arm 390 fixed to the. rock shaft381 is connected by a link 392 to an arm 394 fixed to a rock sha'ft396, there being another arm 398 fixed to. the rock shaft and extending horizontally and having at its end a bolt the head 4000f which liesin the path of a shoulder 401-(Fig. 16) on a block 402 attached to the treadle rod. Depression of the treadle, therefore, first, operates the clutch and then swings the arm 398 dowm wardly andthrough the described connections moves the friction rolls gradually from the low speed position to any desired speed position up to the maximum. To insure that the machine be stopped without shock, mechanism is provided to prevent the treadle rod from engaging the shoulder on the member 374 until after the machine has been slowed down. In other words, the stop can not be thrown in with the machine operating at high s eed.

Pivotal y carried by the end of the arm 398 is a hook 404 normally pressed by a spring 406 in a direction to snap over a lug 408 on the block 402. An extension 410 on the hook engages a stop pin 412 fixed to the machine frame when the mechanism is in the stopped position. A spring 414, which is weaker than the spring 388 above referred to, connects the end of the arm 398 with the treadle rod as shown in Fig. 14. Consequently, the spring 414 will give before the spring 388 will allow any change in the position of the friction rolls when starting the machine. The friction surfaces of the rolls and pulleys are pressed together with the desired pressure by a spring 416 interposed between nuts on the cam shaft 50 and a thrust bearing 418 at one end of the hub 354 and a similar thrust bearing 420 is in terposed between the hub of the wheel 364 and the sleeve 370 to. take the thrust in the other direction.

By the construction above described, depression of the treadle rod 378 first connects up the clutch so that the cam shaft is driven at low speed, the weak spring 414 stretching without affecting the stronger spring 388.

7 As soon as the shoulder 401 on the block 402 engages the arm 398, said arm is swung downwardly to increase the speed of the machine, the stronger spring 388 then being positively stretched. During this movement the ivot of the hook 404 is carried downwar 1y so that the spring 406 causes the hook 404 to swing over and become locked to the lug 408. This relation of the parts continues while the machine is running at any speed above the lowest. When it is desired to stop the machine, the treadle rod is released, the spring 388 thereby swinging the friction rolls to the low speed position and swinging the arm 398 upwardly until the stop pin 412, by engagement with the extension 410, releases the hook 404 from the lug 408. Then and then only is the treadle rod allowed to rise further under control of the weak spring 414 in order to engage its end with the cam 376 and unlock the clutch and bring the machine to a positive stop by engaging the shoulder on the member 374. The spring 414 being weaker than the spring 388, the treadle rod is allowed to move down before the speed changing mechanism can overcome the tension of the spring 388.

Although the invention has been described by reference to a specific machine, it should be understood that the invention, in its broader aspects, is not necessarily limited to the particular machine selected for illustration.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a perforating machine, in combina tion, a punch, a punch plate, a backing strip extending across said punch plate, means constantly tending to feed said strip across said punch plate, means for clamping said strip against said punch plate to receive the impact of a series of punchings, and means for releasing said clamping means to allow a feed movement of said strip.

2. In a perforating machine, in combination, a punch, a punch plate, a backing strip extending across said punch plate, means acting to pull said strip across said punch plate, means for clamping said strip against movement to receive in the same place the impact of a series of punchings, and means for releasing said clamping means to allow a feed movement of the strip after said series of punching movements.

3. In a perforating machine, in combination, a punch, a punch plate, a backing strip extending across said punch plate, means acting to feed said strip across said punch plate, means for clamping said strip against movement to receive the impact of a predetermined number of punchings, means for releasing said clamping means to allow a feed movement of the strip after said predetermined number of punchings, and means for varying said predetermined number of punchings.

4. In .a. perforating machine, in combination, a punch, a punch plate, a backing strip extending across said punch plate, means constantly tending to pull said strip across said punch plate, and mechanism for rendering said means effective at intervals to pull said strip over said block.

5. In a perforating machine, in combination, a punch, a punch plate, a backing strip extending across said punch plate, means for feeding said strip across said punch plate, a clamp plate disposed beneath the work and overlying the strip for clamping it to the punch plate, and an arm for actuating said clamp plate to release the strip for feeding.

6. In a perforating machine, in combination, a punch, means for operating said punch, a punch plate, a backing strip extending across said punch plate, means for feeding said strip across said punch plate, a clamp plate overlying the strip for clamping it to the punch plate, and a plurality of cams operated in timed relation to the punch operating means for selectively releasing the clamp plate with different frequency to punch plate,

vary the time interval during which punching movements are carried out against a given portion of the backing strip.

7. In aperforating machine, in combination, a punch, a punch plate, a backing strip extending across said punch plate, means for feeding said strip across said punch plate, a clamp plate overlying the edges of said strip for holding it against feeding movement, an arm for actuating said clamp plate, a plurality of cams, a roller carried by said arm, and means for shifting said roller to co-operate with any one of said cams to vary the frequency of feed movement of the backing strip.

8. In a perforating machine, in combination, a punch, a backing strip, means for exerting tension on said backing strip, a clamp member to hold said strip against movement, and means for intermittently releasing said clamp member.

' 9. In a perforating machine, in combination, a punch, a backing strip, means for exerting tension on said backing strip, a clamp member to hold said strip against movement, means for releasing said clamp member at fixed intervals, and means for varying said intervals.

10. In a perforating machine, in combination, a punch, a backing strip, means for exerting tension on said backing strip, a clamp member to hold said strip against movement, and means for releasing said clamp member at fixed intervals, means for varying said intervals, said means comprising a shiftable roller and a plurality of cams.

11. In a perforating machine, in combination, a punch, a punch plate, a backing strip extending over said punch plate, means for actuating the punch to feed and punch the stock, means for clamping said strlp against movement to receive, in the'same place, the impact of a series of punching movements of the punch, and means for releasing said strip for feeding under control of the punch.

12. In a perforating machine, in combination, a punch, a punch plate, a backing strip extending over said punch plate, means for actuating the punch to feed and punch the work, means for holding said strip against movement to receive the impact of a series of punching movements of the punch, means for releasing said strip and moving said punch plate to cause the punchto remain embedded in the strip during one of its work feeding movements.

13. In a perforating machine, a punch, a a backing strip, means for actuating the punch to feed and punch the stock, and means controlled by the machine for actuating the punch plate to cause'the punch to control thefeed of the backing strip.

14. In a perforating machine, in combination, a punch plate, a backing strip extending oversaid punch plate, a punch, means for actuating the punch to feed and punch the work, said actuation of the punch including a relief movement, and means for yieldingly raising the punch plate to retain the-punch embedded in the backing strip during the relief movement to feed the backing strip.

15. In a tion, a backing strip, a punch, means for actuating the punch to feed the Work step by step, means for causing said punch to feed the backing strip step by step with less frequency than the step by step feed of the work and means to vary the relative frequencies of feed steps of the strip and the Work.

16..Ina perforating machine, in combination, a punch, a punch plate, a backing J strip extending across said punch plate, means for causing punching movement of the punch, means for retaining the punch plate and backing strip at a constant level while a series of punching movements of the punch take place in the samearea of the strip, and mechanism controlled by the machine for feeding said strip after said series of punching movements of the punch.'

17. In a perforating machine, in combination,'a punch, a punch plate, a backing strip extending across said punch plate, means for causing punching movement of the punch, means for retaining the punch plate and backing strip at a constant level while a series of punching movements of the punch take place in the same area of the strip, means for actuating the punch to feed the work at every punching stroke, and

mechanism for causing the punch to feed the strip a step forward after each series of punching movements of the punch.

18. In a perforating machine, a work feeding punch movable horizontally to feed the work, an anvil,-a punch plate normally supported by the anvil, a backing strip extending across said punch plate, means for raising said punch plate and backing strip intermittently so that the strip is; impaled by the punch and fed thereby, and means for varying the interval between raisings of the punch plate and strip.

19. In a perforating machine, a punch, an anvil, a punch plate normally'supported by the anvil, a backing strip extending across said punch plate, a guide at the sides of the punch plate to guide the backing strip, and means for raising said punch platev and backing strip.

20. In a perforating machine, a work feeding punch. an anvil, a punch plate n0rmally supported by the anvil, a backing strip extending across said punch plate, a plate having a ledge underlying the punch plate, and. means for actuating said plate perforating machine, in combina- I It") i to raise the punch plate and maintain the punch embedded in the backing strip during the feed movement of the punch.

21. In a perforating machine. a punch, a punch plate, a backing strip extending across said punch plate, a guide plate having a ledge underlying the punch plate. and means foractuating the guide plate to raise the punch plate and backing strip.

52. In a perforating machine, a punch, a punch plate. a press-er foot. a backing strip extending across said punch plate, a clamp plate overlying the backing strip to hold it against the punch plate, and means for actuating the clamp plate to hold or release the backing strip.

23. I11 a perforating machine, a punch, a punch plate, a backing strip extending across said punch plate, a combined guide and clamp plate alongside the punch plate and having a flange overlying the backing strip to hold it against the punch plate. and means for releasably actuating the clamp plate to hold the backing strip.

24;. In a perforating machine. a punch. a punch plate, a backing strip extending across said punch plate, a member having a. flange overlying the backing strip to hold it against the punch plate and a ledge under lying the punch plate, and means for actuating the flanged member to release the strip and raise the punch plate.

25. In a perforating machine, a punch. an anvil, a backing strip extending across said anvil. a guideway on the anvil, a member slidable in said guideway and having a flange overlying the backing strip, and means for actuating said member to hold or release the strip.

26. In a perforating machine, a punch, an anvil, a backing strip extending across said anvil, a guideway on the anvil, a member slidable in said guidewav and having a portion underlying the backing strip, and means for actuating said member to raise the back ing strip.

2.7. In a perforating machine, a punch, an anvil. a punch plate normally supported by but separate from the anvil, and means for intermittently raising thepunch plate away from the anvil.

28. In a perforating machine. a frame, spaced horizontal ways on said frame, rods having their-end portions slidable in said ways. a vertical sleeve fixed to said rods for horizontal feeding movement, and a punch ram comprising a Sleeve slidable in said vertical sleeve for punching movement.

29. In a perforating machine. a frame. a vertical sleeve slidable in said frame for horizontal feeding movement. a second sleeve slidable in said vertical seeve for punching movement. a punch spindle rotatable in said second sleeve. and a member extending through both said sleeves for moving the punch spindle to normal position at the beginning of the punching stroke.

30. In a perforating machine, a frame, a vertical sleeve slidable in said frame and having an opening, a second sleeve slidable in said vertical sleeve and having an elongated slot in alignment with the opening, a punch spindle rotatable in said second sleeve, and a cam member extending through said opening and said slot to move the punch spindle to normal position at the beginning of the punching stroke.

3]. In a perforating machine, a work table, a hollow arm overhanging the work table, a sleeve slidable along the inside of the arm in the direction of the length of the arm, a work feeding nmch having .a T- shaped head and carried by the sleeve,means f r sliding the sleeve to feed the work, and a lever co-operating with said T-shaped head to actuate the punch.

32. In a perforating machine, a work table. a hollow arm overhanging the work table and having bearings extending in the d rection of the length of the arm, a plate closing the end of the arm and having bearings in alignment with said first bearings. a punch feeding member slid-able in said bearings. and means for reciprocating the men'iber to feed the work in alignment with the hollow arm.

33. In a perforating machine, a work feeding punch, means for actuating the punch to punch and feed the work, a presser foot to engage the work at one side of the path of the punch, a holddown for the work on the other side of the path of the punch,

and a second holddown beyond the rearward limit of the path of travel of the punch. I

34. In a perforating machine, a work feed ng punch, means for actuating the punch to punch and feed the work, an edge gage at one side of the path of'the punch, a holddown at the opposite side of the path of the punch, and a second holddown beyond the rearward limit of the path of travel of the punch.

In a perforating machine, a work feeding punch, means for actuating the. punch to punch and feed the work, a holddown at one side of the path of the punch, a second holddown beyond the rearward limit of the path of travelof the punch, and means for adjusting said second holddown toward and from the punch in-the line of feed.

36. In a perforating machine, a work feeding punch. means for actuating the punch to punch and feed the work, means for varying the feed stroke of the punch, a holddown near therearward limit of the path of travel of the punch, and means for adjustzng said holddown in the line of feed of the punch.

37. In a perforating machine, a work down at one side of the path'of the punch,"

a second holddown' carried by thev first, and

- means for adjusting both holddowns toward and from the path of travel of the punch.

39. In a perforating machine, a work feeding punch, means for actuating the punch to punch and feed the work, a hold.- down at one side of the path of the punch, a second holddown carried by the first, means for adjusting bot-h holddowns toward and from-the path of travel of the punch, andmeans for adjustin the second holddown in the line of feed 0 the punch. V a 40. In a perforating machine, in combination, a frame, a work feeding punch, a rod extending horizontally from said frame at an angle to the pathof work feeding movement of the punch, a block slidable along the rod, a work engaging member carried by the block, and a screw connection between the rod and the block to furnish a fine adjustment for the work engaging member toward and from the line of feed of the punch. I

41. In a perforating machine, in combination, a frame, a work feeding punch, a guide rod on the frame at right angles to the path of work feeding movement of the nation, a frame,

unch, a member adjustable on the rod, a block slidable on the guide rod, a work engaging screw of small pitch threaded in the adjustable member and engaging the block for moving the block along the rod to furnish a fine adjustment for the work engaging member toward and from the line of feed of the punch. 7 I

'42. In a perforating machine, in combia work feeding punch, a a member adjustably mounted on the guide, a block slidable on the guide at right angles to the path of feeding movement of the punch, a work engaging member carried by the block, and a tangent screw connecting the adjustable member and the block for moving engaging member toward of feed of the punch. I

' 43. In a perforating machine, in combination, a work feeding punch, a backing surface therefor, and an edge gage adjacent to the punch, said gage comprising a rigid arm lying close to butjout of contact with the backing surface, a gage member slidably mounted on the arm and a spring for holdguide on the frame,

and from the line the punch, said member carried by the block, and a a the punch, adjustable the block and the work ing the gage member yieldingly against the backing surface.

44. n a erforating machine, in combination, a wor feedingpunclna backing surface therefor, and an edge gage ad acent to the punch, said gage comprising a rigi arm having itsend overlying the backln surface, a gage member slidable on said en and bearing against the backing surface, and a spring interposed between the arm and gage member to hold the latter yieldingly in contact with the backing surface.

45. Ina erforating machine, in combination, a. wor 'feedingpunch, abacking sur-: face therefor, and an edge gage adjacent to gage comprising a rigid arm having at one end a cylindrical portion above the backing surface, a cylindrical casing slidably mounted on said portion, and a spring'to hold the easing yieldingly against said backing surface.

46. In a erforat-ing machine, in combination, a wor face therefor, and an edge gage ad acent to they punch, said gage comprising a rigid arm overlying the backing surface, a gage member yieldingly mounted on said arm, and means for moving the arm to adjust. the pressure of said gage member against the ackin surface.

47. n a perforating machine, in combination, a work feeding punch,'a backing surface, a block, a member having a stem adjustably mounted in said block and an end portion overlying the backing surface, a gage member yieldlngly mounted on said end portion, and means stem in said block to determine its adjusted position and thereb to adjust the pressure of said'gage mem er against the backing surface." A

48.- In a perforating machine, in combination, a frame, a work feeding punch, a block, a work engaging member swivelled to'the block to move in the line of feed of means contacting with said work engagin member to move the latter in the line 0 feed, and a clamp for rigidl securing said member to said block in ad usted position.

49. In a perforating machine, in combination, a frame, a work feeding punch, a block having an inclined bearing, ing member swivelled in said inclined bearing to move into and out of operative position, and adjusting screw contacting with -one side of said work engaging member to fix the limit of its movement toward the punch, and a clamp for securing said memher to the block in operative or inoperative position.

50. In a perforating machine, in combia work engag-' feeding punch,'a backing surfor clamping said nation, a work feeding punch, a'backing surface therefor, a block, a work engaging member swivelled to the block to move in the line of feed of the punch and slidahle in the block to move toward and from the backing surface. means (.ontacting with said work engaging member to move the latter in the line of feed, and means for moving said member toward and from the hacking surface? In a perforating machine, a punch and a punch plate having relative movement of approach, a backing strip extending across said punch plate, and means for moving the punch plate and the backing strip transversely of the punch to utilize the Width of the strip as a backing.

52. In a perforating machine, a reciprocating punch, a punch plate. a backing strip of flexible material extending across said punch plate, and means for moving the punch plate and backing strip transversely of the punch to utilize the Width of the strip as a backing. v

53. In a perforating machine, a reciprocating punch, a punch plate. a backing strip of flexible material extending across said punch plate, a guide for retaining the backing strip on the punch plate, and means for moving the punch plate and guide transversely of the punch to utilize the Width of the strip as a backin 54. In a perforating machine, a reciproeating punch, a punch plate, a supply reel, a backing strip of flexible material extend ing from said supply reel over said punch plate, and means for moving said supply reel and backing strip transversely of the punch to utilize the Width of the strip as a backing.

55. In a perforating machine, a punch and a punch plate having relative movement of approach to perforate a piece of Work, a flexible strip extending across said punch plate to act as a backing for the punch, and means for relatively moving the backing strip and punch to utilize both the width and the thickness of the strip as a backing.

56. In a perforating machine, a reciproeating punch, a punch plate, a flexible strip extending over said punch plate to act as a backing for the punch, means for feeding the strip lengthwise over the punch plate to utilize the length of the strip, means for moving the strip laterally to utilize the Width of the strip, and means for relatively moving the punch and punch plate to utilize the thickness of the strip.

57. In a perforating machine, in combination, a punch plate, a backing strip extending over said punch plate, a punch, and means for causing the punch to feed either thework or the backing strip.

58. In a perforating machine. in combination. a punch plate. a backing strip extending across said punch plate. means for inter mittently feedingsaid strip to bring successive portions of the strip into operative relation to said punch plate. and means for moving the backing strip transversely ot-the direction of feed of said strip to utilize both the width and the length of said strip as a backing.

In a perforating machine. a punch and a punch plate having relative movement of approach to perforate a piece of work. a flexible backing strip extending across said punch plate. means for intermittentl} causing said punch to feed the backing strip in a direction angularlv related to the direction of the relative movement of approach, and means for moving said strip laterally with respect to the direction of feeding movement thereof.

60. In a perforating machine. a reciprocating punch, a punch plate. a flexible strip extending over said punch plate to act as a backing for the punch, means for ausing said punch to feed the strip lengthwise over the punch plate to utilize. the length of the strip, means for moving the strip laterally with respect to the punch plate to utilize the width of the strip, and means for relatively moving the punch and punch plate to utilize the thickness of the strip.

61. In a perforating machine, in combination, a punch, a punch plate, a backing strip,

extending over said punch plate, means for actuating. the punch to feed and punch the stock, means for clamping said strip against movement to receive, in the same place, the impact of a series of punching movements of the, punch, means for exerting tension on said backing strip tending to pull it forward, and means for releasing said strip for feeding under control of the punch.

62. In a perforating machine, a reciprocating punch, a punch plate, a flexible strip extending over said punch plate to act as a backing for the punch, means for feeding the strip lengthwise over the punch plate to utilize the length of the strip, and meansfor moving the strip laterally to utilize the width of the strip.

In testimony whereof I have signed my name to this specification.

PERLEY R. GLASS.

Certificate of Correction.

Letters Patent No. 1,580,182, granted April 13, 1926, Van Valkenberg, of onroe Washington, for an were erroneously issued to the inventor, said Oscar Silverstein, of Spokane, VVashing gton, d to the inventor, said Van It is hereby certified that upon the application of Eber H. im rovement in Dirigible Airships, i an Valkenberg and one-fourth to whereas said Letters Patent should have been issue Vallrenberg and Oscar Siloemtein, said Silverstein being assignee of one-half interest in said invention, as shown by the records of assignments in this ofiice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

' Signed and sealed this 18th day of May, A. D. 1926.

[emu] M. J. MOORE,

Acting Gommz'csimr of Patents.

DISCLAIMER 1,580,132.--Pc-rZcg Ii. Glass, lVayland Mass.

April 13, 1926'. Disclaimer filed February fllawlri-nmy Umjyrm'afirm.

Pma onl-vri Nu Macn [NI-I.

4, 192-31., liy the assigned l-l orol'iy enters this disclaimer to said claims oh and (L of said Letters lalont whit-h are in the i' .)llo\vin; words, to wit:

58. in a. porioratn'lg lnzn' lnno, in combination,

successive portions of the strip into oporativo relation to said punch plate, for moving the l'JZlClUllQf strip transversely of the direction of feed of sald strip to u hze both the Width and the length of said strip as a backing.

62. In a perforating machine, a reciprocating punch. a punch plate, extending over said punch plate to Y the striplengthwise for moving the stri [Official Gazette I act as a backing for the punch. moans laterally to utilize the width of the strip. ebv'ua-rg 21;, 1931.]

latent dated Uni-15ml Show a punch plalo. a backing strip v lendin g across said punch plalo. means for intorniitlmnly feeding said strip to bring and means a flexible str for feeding over the punch plate to utilize the length of the strip, and means 

